We know that in July there will be first party game reveals. We can hope Halo Infinite is a part of this reveal.
"In July, we will dedicate time to focus on the incredible games coming from Xbox Game Studios. A number of our studio teams are looking forward to sharing first looks at new gameplay, insights from development teams being optimized for Xbox Series X, and brand-new game announcements. We cannot wait to share this initial look at what some of those teams are working on." (Jerret West, CVP, Gaming Marketing, May 5, 2020)
Xbox continues to say, "Our goal remains to launch Xbox Series X and Halo Infinite this Holiday" (Jerret West, May 5, 2020)
"For PC players, we plan to support the community by making all our major releases at launch available with Xbox Game Pass for PC, including Halo Infinite, Wasteland 3, Minecraft Dungeons and of course, Microsoft Flight Simulator."(Jerret West, May 5, 2020)
343 told us that Halo Infinite stays on time as the studio advances to work from home because of COVID-19.
Sources:
https://www.halowaypoint.com/en-us/news/remote-reports
https://news.xbox.com/en-us/2020/05/05/xbox-2020-the-future-of-xbox/